Under the influence of the basement structure of the rifted basin,deposits dumped into the sag from the lake bank with large elevation difference and went forward along the elongated trough faults.

• 综合各种沉积环境标志细分出了主沟道、主沟道间漫溢微相、分流沟道、分流沟道间、分流沟道漫溢微相,前缘微相等六种微相。